@webcomponents/shadydom - npm Package Compare versions

Comparing version 1.3.1 to 1.4.0

externs/shadydom.js

@@ -28,1 +28,7 @@ /**
 Node.prototype.__shady;
+
+/** @interface */
+function IWrapper() {}
+
+/** @type {Object} */
+IWrapper.prototype._activeElement;

package.json

 {
   "name": "@webcomponents/shadydom",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "Shadow DOM polyfill",
@@ -31,3 +31,3 @@ "main": "shadydom.min.js",
     "test": "npm run lint && npm run build && wct",
-    "debug": "rollup -c",
+    "debug": "gulp debug",
     "lint": "eslint src",
@@ -47,3 +47,3 @@ "regen-package-lock": "rm -rf node_modules package-lock.json; npm install",
     "@webcomponents/custom-elements": "^1.1.3",
-    "@webcomponents/shadycss": "^1.5.0",
+    "@webcomponents/shadycss": "^1.7.1",
     "@webcomponents/template": "^1.3.1",
@@ -55,2 +55,4 @@ "@webcomponents/webcomponents-platform": "^1.0.0",
     "gulp": "^4.0.0",
+    "gulp-rename": "^1.4.0",
+    "gulp-rollup": "^2.16.2",
     "gulp-size": "^3.0.0",
@@ -57,0 +59,0 @@ "gulp-sourcemaps": "^2.6.4",

shadydom.min.js

@@ -10,83 +10,85 @@ (function(){/*
 */
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+var jc=B({get previousElementSibling(){var a=u(this);if(a&&void 0!==a.previousSibling){for(a=this.__shady_previousSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.__shady_previousSibling;return a}return this.__shady_native_previousElementSibling},get nextElementSibling(){var a=u(this);if(a&&void 0!==a.nextSibling){for(a=this.__shady_nextSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.__shady_nextSibling;return a}return this.__shady_native_nextElementSibling},get slot(){return this.getAttribute("slot")},
+set slot(a){this.__shady_setAttribute("slot",a)},get shadowRoot(){var a=u(this);return a&&a.O||null},get className(){return this.getAttribute("class")||""},set className(a){this.__shady_setAttribute("class",a)},setAttribute:function(a,b){if(this.ownerDocument!==hc)this.__shady_native_setAttribute(a,b);else{var c;(c=H())&&"class"===a?(c.setElementClass(this,b),c=!0):c=!1;c||(this.__shady_native_setAttribute(a,b),ic(this,a))}},removeAttribute:function(a){this.__shady_native_removeAttribute(a);ic(this,
+a)},attachShadow:function(a){if(!this)throw"Must provide a host.";if(!a)throw"Not enough arguments.";return new N(mb,this,a)}});var kc=B({blur:function(){var a=u(this);(a=(a=a&&a.root)&&a.activeElement)?a.__shady_blur():this.__shady_native_blur()}});Wb.forEach(function(a){kc[a]={set:function(b){var c=t(this),d=a.substring(2);c.v[a]&&this.removeEventListener(d,c.v[a]);this.__shady_addEventListener(d,b);c.v[a]=b},get:function(){var b=u(this);return b&&b.v[a]},configurable:!0}});var lc=B({assignedNodes:function(a){if("slot"===this.localName){var b=this.__shady_getRootNode();b&&x(b)&&pb(b);return(b=u(this))?(a&&a.flatten?b.h:b.assignedNodes)||[]:[]}}});var mc=window.document,nc=B({importNode:function(a,b){if(a.ownerDocument!==mc||"template"===a.localName)return this.__shady_native_importNode(a,b);var c=this.__shady_native_importNode(a,!1);if(b){a=a.__shady_childNodes;b=0;for(var d;b<a.length;b++)d=this.__shady_importNode(a[b],!0),c.__shady_appendChild(d)}return c}});var oc=B({addEventListener:Nb.bind(window),removeEventListener:Pb.bind(window)});var Y={};Object.getOwnPropertyDescriptor(HTMLElement.prototype,"parentElement")&&(Y.parentElement=J.parentElement);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"contains")&&(Y.contains=J.contains);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"children")&&(Y.children=K.children);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"innerHTML")&&(Y.innerHTML=jb.innerHTML);
+var pc={EventTarget:[ec],Node:[J,window.EventTarget?null:ec],Text:[fc],Element:[jc,K,fc,!v.f||"innerHTML"in Element.prototype?jb:null,window.HTMLSlotElement?null:lc],HTMLElement:[kc,Y],HTMLSlotElement:[lc],DocumentFragment:[Ya,Za],Document:[nc,Ya,Za,$a],Window:[oc]};function qc(a){var b={},c;for(c in pc)b.D=window[c]&&window[c].prototype,pc[c].forEach(function(b){return function(c){return b.D&&c&&A(b.D,c,a)}}(b)),b={D:b.D}};function Z(a){this.node=a}m=Z.prototype;m.addEventListener=function(a,b,c){return this.node.__shady_addEventListener(a,b,c)};m.removeEventListener=function(a,b,c){return this.node.__shady_removeEventListener(a,b,c)};m.appendChild=function(a){return this.node.__shady_appendChild(a)};m.insertBefore=function(a,b){return this.node.__shady_insertBefore(a,b)};m.removeChild=function(a){return this.node.__shady_removeChild(a)};m.replaceChild=function(a,b){return this.node.__shady_replaceChild(a,b)};
+m.cloneNode=function(a){return this.node.__shady_cloneNode(a)};m.getRootNode=function(a){return this.node.__shady_getRootNode(a)};m.contains=function(a){return this.node.__shady_contains(a)};m.dispatchEvent=function(a){return this.node.__shady_dispatchEvent(a)};m.setAttribute=function(a,b){this.node.__shady_setAttribute(a,b)};m.getAttribute=function(a){return this.node.__shady_native_getAttribute(a)};m.removeAttribute=function(a){this.node.__shady_removeAttribute(a)};m.attachShadow=function(a){return this.node.__shady_attachShadow(a)};
+m.focus=function(){this.node.__shady_native_focus()};m.blur=function(){this.node.__shady_blur()};m.importNode=function(a,b){if(this.node.nodeType===Node.DOCUMENT_NODE)return this.node.__shady_importNode(a,b)};m.getElementById=function(a){if(this.node.nodeType===Node.DOCUMENT_NODE)return this.node.__shady_getElementById(a)};m.querySelector=function(a){return this.node.__shady_querySelector(a)};m.querySelectorAll=function(a,b){return this.node.__shady_querySelectorAll(a,b)};
+m.assignedNodes=function(a){if("slot"===this.node.localName)return this.node.__shady_assignedNodes(a)};
+p.Object.defineProperties(Z.prototype,{activeElement:{configurable:!0,enumerable:!0,get:function(){if(x(this.node)||this.node.nodeType===Node.DOCUMENT_NODE)return this.node.__shady_activeElement}},_activeElement:{configurable:!0,enumerable:!0,get:function(){return this.activeElement}},host:{configurable:!0,enumerable:!0,get:function(){if(x(this.node))return this.node.host}},parentNode:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_parentNode}},firstChild:{configurable:!0,enumerable:!0,
+get:function(){return this.node.__shady_firstChild}},lastChild:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_lastChild}},nextSibling:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_nextSibling}},previousSibling:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_previousSibling}},childNodes:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_childNodes}},parentElement:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_parentElement}},
+firstElementChild:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_firstElementChild}},lastElementChild:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_lastElementChild}},nextElementSibling:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_nextElementSibling}},previousElementSibling:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_previousElementSibling}},children:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_children}},
+childElementCount:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_childElementCount}},shadowRoot:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_shadowRoot}},assignedSlot:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_assignedSlot}},isConnected:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_isConnected}},innerHTML:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_innerHTML},set:function(a){this.node.__shady_innerHTML=
+a}},textContent:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_textContent},set:function(a){this.node.__shady_textContent=a}},slot:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_slot},set:function(a){this.node.__shady_slot=a}}});Wb.forEach(function(a){Object.defineProperty(Z.prototype,a,{get:function(){return this.node["__shady_"+a]},set:function(b){this.node["__shady_"+a]=b},configurable:!0})});var rc=new WeakMap;
+function sc(a){if(x(a)||a instanceof Z)return a;var b=rc.get(a);b||(b=new Z(a),rc.set(a,b));return b};v.J&&(window.ShadyDOM={inUse:v.J,patch:function(a){Da(a);Ca(a);return a},isShadyRoot:x,enqueue:ya,flush:D,settings:v,filterMutations:Ab,observeChildren:yb,unobserveChildren:zb,deferConnectionCallbacks:v.deferConnectionCallbacks,preferPerformance:v.preferPerformance,handlesDynamicScoping:!0,wrap:v.m?sc:function(a){return a},Wrapper:Z,composedPath:Fb,noPatch:v.m,nativeMethods:Xb,nativeTree:Yb},dc(),qc("__shady_"),Object.defineProperty(document,"_activeElement",$a.activeElement),A(Window.prototype,oc,
+"__shady_"),v.m||(qc(),Vb()),Qb(),window.Event=Sb,window.CustomEvent=Tb,window.MouseEvent=Ub,window.ShadowRoot=N);}).call(this);
 
 //# sourceMappingURL=shadydom.min.js.map

src/attach-shadow.js

@@ -14,9 +14,6 @@ /**
 import {enqueue} from './flush.js';
-import {recordChildNodes} from './logical-tree.js';
-import {removeChild, insertBefore, dispatchEvent} from './native-methods.js';
-import {accessors} from './native-tree.js';
 import {ensureShadyDataForNode, shadyDataForNode} from './shady-data.js';
+import {recordChildNodes} from './link-nodes.js';
+import {patchShadyRoot} from './patch-shadyRoot.js';
 
-const {parentNode, childNodes} = accessors;
-
 // Do not export this object. It must be passed as the first argument to the
@@ -40,3 +37,3 @@ // ShadyRoot constructor in `attachShadow` to prevent the constructor from
     ancestors.unshift(node);
-  } while ((node = node.parentNode));
+  } while ((node = node[utils.SHADY_PREFIX + 'parentNode']));
   return ancestors;
@@ -60,8 +57,7 @@ }
     this.host = host;
-    this._mode = options && options.mode;
-    const c$ = childNodes(host);
-    recordChildNodes(host, c$);
+    this.mode = options && options.mode;
+    recordChildNodes(host);
     const hostData = ensureShadyDataForNode(host);
     hostData.root = this;
-    hostData.publicRoot = this._mode !== MODE_CLOSED ? this : null;
+    hostData.publicRoot = this.mode !== MODE_CLOSED ? this : null;
     // setup root
@@ -84,4 +80,5 @@ const rootData = ensureShadyDataForNode(this);
     if (utils.settings['preferPerformance']) {
-      for (let i=0, l=c$.length; i < l; i++) {
-        removeChild.call(host, c$[i])
+      let n;
+      while ((n = host[utils.NATIVE_PREFIX + 'firstChild'])) {
+        host[utils.NATIVE_PREFIX + 'removeChild'](n);
       }
@@ -117,5 +114,5 @@ } else {
   _rendererForHost() {
-    let root = this.host.getRootNode();
+    let root = this.host[utils.SHADY_PREFIX + 'getRootNode']();
     if (utils.isShadyRoot(root)) {
-      let c$ = this.host.childNodes;
+      let c$ = this.host[utils.SHADY_PREFIX + 'childNodes'];
       for (let i=0, c; i < c$.length; i++) {
@@ -137,2 +134,10 @@ c = c$[i];
 
+  // renders if render is pending.
+  _flush() {
+    const root = this._getRenderRoot();
+    if (root && root._renderPending) {
+      root['_renderRoot']();
+    }
+  }
+
   // NOTE: avoid renaming to ease testability.
@@ -152,9 +157,9 @@ ['_renderRoot']() {
     if (!utils.settings['preferPerformance'] && !this._hasRendered) {
-      const c$ = this.host.childNodes;
+      const c$ = this.host[utils.SHADY_PREFIX + 'childNodes'];
       for (let i=0, l=c$.length; i < l; i++) {
         const child = c$[i];
         const data = shadyDataForNode(child);
-        if (parentNode(child) === this.host &&
+        if (child[utils.NATIVE_PREFIX + 'parentNode'] === this.host &&
             (child.localName === 'slot' || !data.assignedSlot)) {
-          removeChild.call(this.host, child);
+          this.host[utils.NATIVE_PREFIX + 'removeChild'](child);
         }
@@ -178,3 +183,3 @@ }
     // distribute host children.
-    for (let n=this.host.firstChild; n; n=n.nextSibling) {
+    for (let n=this.host[utils.SHADY_PREFIX + 'firstChild']; n; n=n[utils.SHADY_PREFIX + 'nextSibling']) {
       this._distributeNodeToSlot(n);
@@ -188,7 +193,7 @@ }
       if (!slotData.assignedNodes.length) {
-        for (let n=slot.firstChild; n; n=n.nextSibling) {
+        for (let n=slot[utils.SHADY_PREFIX + 'firstChild']; n; n=n[utils.SHADY_PREFIX + 'nextSibling']) {
           this._distributeNodeToSlot(n, slot);
         }
       }
-      const slotParentData = shadyDataForNode(slot.parentNode);
+      const slotParentData = shadyDataForNode(slot[utils.SHADY_PREFIX + 'parentNode']);
       const slotParentRoot = slotParentData && slotParentData.root;
@@ -238,3 +243,3 @@ if (slotParentRoot && (slotParentRoot._hasInsertionPoint() || slotParentRoot._renderPending)) {
     if (!slot) {
-      let name = node.slot || CATCHALL_NAME;
+      let name = node[utils.SHADY_PREFIX + 'slot'] || CATCHALL_NAME;
       const list = this._slotMap[name];
@@ -303,3 +308,3 @@ slot = list && list[0];
     // Spec says it bubbles (https://dom.spec.whatwg.org/#mutation-observers)
-    dispatchEvent.call(slot, new Event('slotchange'));
+    slot[utils.NATIVE_PREFIX + 'dispatchEvent'](new Event('slotchange'));
     const slotData = shadyDataForNode(slot);
@@ -320,3 +325,3 @@ if (slotData.assignedSlot) {
     for (let i=0; i < slots.length; i++) {
-      const parent = slots[i].parentNode;
+      const parent = slots[i][utils.SHADY_PREFIX + 'parentNode'];
       /* compose node only if:
@@ -344,3 +349,3 @@ (1) parent does not have a shadowRoot since shadowRoot has already
     let children = [];
-    let c$ = node.childNodes;
+    let c$ = node[utils.SHADY_PREFIX + 'childNodes'];
     for (let i = 0; i < c$.length; i++) {
@@ -370,3 +375,3 @@ let child = c$[i];
   _updateChildNodes(container, children) {
-    let composed = childNodes(container);
+    let composed = Array.prototype.slice.call(container[utils.NATIVE_PREFIX + 'childNodes']);
     let splices = calculateSplices(children, composed);
@@ -380,4 +385,4 @@ // process removals
         // the node being removed here.
-        if (parentNode(n) === container) {
-          removeChild.call(container, n);
+        if (n[utils.NATIVE_PREFIX + 'parentNode'] === container) {
+          container[utils.NATIVE_PREFIX + 'removeChild'](n);
         }
@@ -394,3 +399,3 @@ // TODO(sorvell): avoid the need for splicing here.
         n = children[j];
-        insertBefore.call(container, n, next);
+        container[utils.NATIVE_PREFIX + 'insertBefore'](n, next);
         composed.splice(j, 0, n);
@@ -433,3 +438,3 @@ }
       recordChildNodes(slot);
-      recordChildNodes(slot.parentNode);
+      recordChildNodes(slot[utils.SHADY_PREFIX + 'parentNode']);
       let name = this._nameForSlot(slot);
@@ -473,3 +478,3 @@ if (this._slotMap[name]) {
         if (nA !== nB) {
-          let c$ = Array.from(nA.parentNode.childNodes);
+          let c$ = Array.from(nA[utils.SHADY_PREFIX + 'parentNode'][utils.SHADY_PREFIX + 'childNodes']);
           return c$.indexOf(nA) - c$.indexOf(nB);
@@ -543,5 +548,5 @@ }
         let node = n$[i];
-        let parent = parentNode(node);
+        let parent = node[utils.NATIVE_PREFIX + 'parentNode'];
         if (parent) {
-          removeChild.call(parent, node);
+          parent[utils.NATIVE_PREFIX + 'removeChild'](node);
         }
@@ -560,2 +565,3 @@ }
 
+patchShadyRoot(ShadyRoot.prototype);
 export {ShadyRoot};
@@ -567,3 +573,3 @@
 */
-export function attachShadow(host, options) {
+export const attachShadow = (host, options) => {
   if (!host) {
@@ -586,5 +592,10 @@ throw 'Must provide a host.';
     // allow elements to connect
-    const map = Array.from(connectMap);
+    // save map state (without needing polyfills on IE11)
+    const r = [];
+    connectMap.forEach((v, k) => {
+      r.push([k, v]);
+    });
     connectMap.clear();
-    for (const [e, value] of map) {
+    for (let i=0; i < r.length; i++) {
+      const e = r[i][0], value = r[i][1];
       if (value) {
@@ -591,0 +602,0 @@ e.__shadydom_connectedCallback();

src/patch-events.js

@@ -12,3 +12,2 @@ /**
 import * as utils from './utils.js';
-import * as nativeMethods from './native-methods.js';
 import {shadyDataForNode} from './shady-data.js';
@@ -90,14 +89,29 @@
 
+/**
+ * Some EventTarget subclasses are not Node subclasses, and you cannot call
+ * `getRootNode()` on them.
+ *
+ * @param {!(Node|EventTarget)} eventTarget
+ * @return {!(Node|EventTarget)}
+ */
+function getRootNodeWithFallback(eventTarget) {
+  if (eventTarget instanceof Node) {
+    return eventTarget[utils.SHADY_PREFIX + 'getRootNode']();
+  } else {
+    return eventTarget;
+  }
+}
+
 function pathComposer(startNode, composed) {
   let composedPath = [];
   let current = startNode;
-  let startRoot = startNode === window ? window : startNode.getRootNode();
+  let startRoot = getRootNodeWithFallback(startNode);
   while (current) {
     composedPath.push(current);
-    if (current.assignedSlot) {
-      current = current.assignedSlot;
+    if (current[utils.SHADY_PREFIX + 'assignedSlot']) {
+      current = current[utils.SHADY_PREFIX + 'assignedSlot'];
     } else if (current.nodeType === Node.DOCUMENT_FRAGMENT_NODE && current.host && (composed || current !== startRoot)) {
       current = current.host;
     } else {
-      current = current.parentNode;
+      current = current[utils.SHADY_PREFIX + 'parentNode'];
     }
@@ -112,2 +126,9 @@ }
 
+export const composedPath = (event) => {
+  if (!event.__composedPath) {
+    event.__composedPath = pathComposer(event.target, true);
+  }
+  return event.__composedPath;
+}
+
 function retarget(refNode, path) {
@@ -123,3 +144,3 @@ if (!utils.isShadyRoot) {
     ancestor = p$[i];
-    root = ancestor === window ? window : ancestor.getRootNode();
+    root = getRootNodeWithFallback(ancestor);
     if (root !== lastRoot) {
@@ -135,3 +156,3 @@ rootIdx = refNodePath.indexOf(root);
 
-let eventMixin = {
+let EventPatches = {
 
@@ -213,3 +234,3 @@ /**
   // put constructor properties on subclass
-  utils.mixin(klazz, Base);
+  klazz.__proto__ = Base;
   klazz.prototype = Base.prototype;
@@ -289,3 +310,3 @@ return klazz;
       if (node !== window) {
-        lastFiredRoot = node.getRootNode();
+        lastFiredRoot = node[utils.SHADY_PREFIX + 'getRootNode']();
       }
@@ -356,7 +377,4 @@ if (e.__propagationStopped) {
 
-  const ael = this instanceof Window ? nativeMethods.windowAddEventListener :
-      nativeMethods.addEventListener;
-
   if (unpatchedEvents[type]) {
-    return ael.call(this, type, fnOrObj, optionsOrCapture);
+    return this[utils.NATIVE_PREFIX + 'addEventListener'](type, fnOrObj, optionsOrCapture);
   }
@@ -402,3 +420,3 @@
     if (once) {
-      this.removeEventListener(type, fnOrObj, optionsOrCapture);
+      this[utils.SHADY_PREFIX + 'removeEventListener'](type, fnOrObj, optionsOrCapture);
     }
@@ -468,3 +486,3 @@ if (!e['__target']) {
   } else {
-    ael.call(this, type, wrapperFn, optionsOrCapture);
+    this[utils.NATIVE_PREFIX + 'addEventListener'](type, wrapperFn, optionsOrCapture);
   }
@@ -480,6 +498,4 @@ }
   }
-  const rel = this instanceof Window ? nativeMethods.windowRemoveEventListener :
-    nativeMethods.removeEventListener;
   if (unpatchedEvents[type]) {
-    return rel.call(this, type, fnOrObj, optionsOrCapture);
+    return this[utils.NATIVE_PREFIX + 'removeEventListener'](type, fnOrObj, optionsOrCapture);
   }
@@ -511,3 +527,3 @@ // NOTE(valdrin) invoking external functions is costly, inline has better perf.
   }
-  rel.call(this, type, wrapperFn || fnOrObj, optionsOrCapture);
+  this[utils.NATIVE_PREFIX + 'removeEventListener'](type, wrapperFn || fnOrObj, optionsOrCapture);
   if (wrapperFn && nonBubblingEventsToRetarget[type] &&
@@ -525,3 +541,3 @@ this.__handlers && this.__handlers[type]) {
   for (let ev in nonBubblingEventsToRetarget) {
-    window.addEventListener(ev, function(e) {
+    window[utils.NATIVE_PREFIX + 'addEventListener'](ev, function(e) {
       if (!e['__target']) {
@@ -535,24 +551,39 @@ patchEvent(e);
 
+const EventPatchesDescriptors = utils.getOwnPropertyDescriptors(EventPatches);
+
+const SHADY_PROTO = '__shady_patchedProto';
+const SHADY_SOURCE_PROTO = '__shady_sourceProto';
+
 function patchEvent(event) {
   event['__target'] = event.target;
   event.__relatedTarget = event.relatedTarget;
-  // patch event prototype if we can
+  // attempt to patch prototype (via cache)
   if (utils.settings.hasDescriptors) {
-    utils.patchPrototype(event, eventMixin);
+    const proto = Object.getPrototypeOf(event);
+    if (!Object.hasOwnProperty(proto, SHADY_PROTO)) {
+      const patchedProto = Object.create(proto);
+      patchedProto[SHADY_SOURCE_PROTO] = proto;
+      utils.patchProperties(patchedProto, EventPatchesDescriptors);
+      proto[SHADY_PROTO] = patchedProto;
+    }
+    event.__proto__ = proto[SHADY_PROTO];
   // and fallback to patching instance
   } else {
-    utils.extend(event, eventMixin);
+    utils.patchProperties(event, EventPatchesDescriptors);
   }
 }
 
-let PatchedEvent = mixinComposedFlag(window.Event);
-let PatchedCustomEvent = mixinComposedFlag(window.CustomEvent);
-let PatchedMouseEvent = mixinComposedFlag(window.MouseEvent);
+let PatchedEvent = mixinComposedFlag(Event);
+let PatchedCustomEvent = mixinComposedFlag(CustomEvent);
+let PatchedMouseEvent = mixinComposedFlag(MouseEvent);
 
+
 export function patchEvents() {
+  activateFocusEventOverrides();
   window.Event = PatchedEvent;
   window.CustomEvent = PatchedCustomEvent;
   window.MouseEvent = PatchedMouseEvent;
-  activateFocusEventOverrides();
+}
 
+export function patchClick() {
   // Fix up `Element.prototype.click()` if `isTrusted` is supported, but `composed` isn't
@@ -567,3 +598,3 @@ if (!composedGetter && Object.getOwnPropertyDescriptor(Event.prototype, 'isTrusted')) {
       });
-      this.dispatchEvent(ev);
+      this[utils.SHADY_PREFIX + 'dispatchEvent'](ev);
     };
@@ -577,1 +608,4 @@ if (Element.prototype.click) {
 }
+
+export const eventPropertyNames = Object.getOwnPropertyNames(Document.prototype)
+    .filter(name => name.substring(0,2) === 'on');

src/shadydom.js

@@ -24,8 +24,8 @@ /**
 import {observeChildren, unobserveChildren, filterMutations} from './observe-changes.js';
-import * as nativeMethods from './native-methods.js';
-import {accessors as nativeTree} from './native-tree.js';
-import {patchBuiltins} from './patch-builtins.js';
-import {patchInsideElementAccessors, patchOutsideElementAccessors} from './patch-accessors.js';
-import {patchEvents} from './patch-events.js';
+import {addNativePrefixedProperties, nativeMethods, nativeTree} from './patch-native.js';
+import {patchInsideElementAccessors, patchOutsideElementAccessors} from './patch-instances.js';
+import {patchEvents, patchClick, composedPath} from './patch-events.js';
 import {ShadyRoot} from './attach-shadow.js';
+import {wrap, Wrapper} from './wrapper.js';
+import {addShadyPrefixedProperties, applyPatches} from './patch-prototypes.js';
 
@@ -55,4 +55,2 @@ if (utils.settings.inUse) {
     'unobserveChildren': unobserveChildren,
-    'nativeMethods': nativeMethods,
-    'nativeTree': nativeTree,
     // Set to true to defer native custom elements connection until the
@@ -75,3 +73,14 @@ // document has fully parsed. This enables custom elements that create
     // as ShadyDOM will now handle dynamic scoping.
-    'handlesDynamicScoping': true
+    'handlesDynamicScoping': true,
+    'wrap': utils.settings.noPatch ? wrap : (n) => n,
+    'Wrapper': Wrapper,
+    'composedPath': composedPath,
+    // Set to true to avoid patching regular platform property names. When set,
+    // Shadow DOM compatible behavior is only available when accessing DOM
+    // API using `ShadyDOM.wrap`, e.g. `ShadyDOM.wrap(element).shadowRoot`.
+    // This setting provides a small performance boost, but requires all DOM API
+    // access that requires Shadow DOM behavior to be proxied via `ShadyDOM.wrap`.
+    'noPatch': utils.settings.noPatch,
+    'nativeMethods': nativeMethods,
+    'nativeTree': nativeTree
   };
@@ -81,8 +90,44 @@
 
-  // Apply patches to events...
+  // Modifies native prototypes for Node, Element, etc. to
+  // make native platform behavior available at prefixed names, e.g.
+  // `utils.NATIVE_PREFIX + 'firstChild'` or `__shady_native_firstChild`.
+  // This allows the standard names to be safely patched while retaining the
+  // ability for native behavior to be used. This polyfill manipulates DOM
+  // by using this saved native behavior.
+  // Note, some browsers do not have proper element descriptors for
+  // accessors; in this case, native behavior for these accessors is simulated
+  // via a TreeWalker.
+  addNativePrefixedProperties();
+
+  // Modifies native prototypes for Node, Element, etc. to make ShadowDOM
+  // behavior available at prefixed names, e.g.
+  // `utils.SHADY_PREFIX + 'firstChild` or `__shady_firstChild`. This is done
+  // so this polyfill can perform Shadow DOM style DOM manipulation.
+  // Because patching normal platform property names is optional, these prefixed
+  // names are used internally.
+  addShadyPrefixedProperties();
+
+  // Modifies native prototypes for Node, Element, etc. to patch
+  // regular platform property names to have Shadow DOM compatible API behavior.
+  // This applies the utils.SHADY_PREFIX behavior to normal names. For example,
+  // if `noPatch` is not set, then `el.__shady_firstChild` is equivalent to
+  // `el.firstChild`.
+  // NOTE, on older browsers (old Chrome/Safari) native accessors cannot be
+  // patched on prototypes (e.g. Node.prototype.firstChild cannot be modified).
+  // On these browsers, instance level patching is performed where needed; this
+  // instance patching is only done when `noPatch` is *not* set.
+  if (!utils.settings.noPatch) {
+    applyPatches();
+    // Patch click event behavior only if we're patching
+    patchClick()
+  }
+
+  // For simplicity, patch events unconditionally.
+  // Patches the event system to have Shadow DOM compatible behavior (e.g.
+  // event retargeting). When `noPatch` is set, retargeting is only available
+  // when adding event listeners and dispatching events via `ShadyDOM.wrap`
+  // (e.g. `ShadyDOM.wrap(element).addEventListener(...)`).
   patchEvents();
-  // Apply patches to builtins (e.g. Element.prototype) where applicable.
-  patchBuiltins();
 
   window.ShadowRoot = ShadyRoot;
 }

src/utils.js

@@ -12,20 +12,14 @@ /**
 
-export let settings = window['ShadyDOM'] || {};
+export const settings = window['ShadyDOM'] || {};
 
 settings.hasNativeShadowDOM = Boolean(Element.prototype.attachShadow && Node.prototype.getRootNode);
 
-let desc = Object.getOwnPropertyDescriptor(Node.prototype, 'firstChild');
+const desc = Object.getOwnPropertyDescriptor(Node.prototype, 'firstChild');
 
 settings.hasDescriptors = Boolean(desc && desc.configurable && desc.get);
 settings.inUse = settings['force'] || !settings.hasNativeShadowDOM;
+settings.noPatch = settings['noPatch'] || false;
+settings.preferPerformance = settings['preferPerformance'];
 
-// Default to using native accessors (instead of treewalker) only for
-// IE/Edge where they are faster.
-const IS_IE = navigator.userAgent.match('Trident');
-const IS_EDGE = navigator.userAgent.match('Edge');
-if (settings.useNativeAccessors === undefined) {
-  settings.useNativeAccessors = settings.hasDescriptors && (IS_IE || IS_EDGE);
-}
-
-export function isTrackingLogicalChildNodes(node) {
+export const isTrackingLogicalChildNodes = (node) => {
   const nodeData = shadyDataForNode(node);
@@ -35,8 +29,8 @@ return (nodeData && nodeData.firstChild !== undefined);
 
-export function isShadyRoot(obj) {
+export const isShadyRoot = (obj) => {
   return Boolean(obj._localName === 'ShadyRoot');
 }
 
-export function ownerShadyRootForNode(node) {
-  let root = node.getRootNode();
+export const ownerShadyRootForNode = (node) => {
+  let root = node[SHADY_PREFIX + 'getRootNode']();
   if (isShadyRoot(root)) {
@@ -47,2 +41,8 @@ return root;
 
+export const hasShadowRootWithSlot = (node) => {
+  const nodeData = shadyDataForNode(node);
+  let root = nodeData && nodeData.root;
+  return (root && root._hasInsertionPoint());
+}
+
 let p = Element.prototype;
@@ -53,31 +53,7 @@ let matches = p.matches || p.matchesSelector ||
 
-export function matchesSelector(element, selector) {
+export const matchesSelector = (element, selector) => {
   return matches.call(element, selector);
 }
 
-function copyOwnProperty(name, source, target) {
-  let pd = Object.getOwnPropertyDescriptor(source, name);
-  if (pd) {
-    Object.defineProperty(target, name, pd);
-  }
-}
-
-export function extend(target, source) {
-  if (target && source) {
-    let n$ = Object.getOwnPropertyNames(source);
-    for (let i=0, n; (i<n$.length) && (n=n$[i]); i++) {
-      copyOwnProperty(n, source, target);
-    }
-  }
-  return target || source;
-}
-
-export function extendAll(target, ...sources) {
-  for (let i=0; i < sources.length; i++) {
-    extend(target, sources[i]);
-  }
-  return target;
-}
-
-export function mixin(target, source) {
+export const mixin = (target, source) => {
   for (var i in source) {
@@ -89,15 +65,4 @@ target[i] = source[i];
 
-export function patchPrototype(obj, mixin) {
-  let proto = Object.getPrototypeOf(obj);
-  if (!proto.hasOwnProperty('__patchProto')) {
-    let patchProto = Object.create(proto);
-    patchProto.__sourceProto = proto;
-    extend(patchProto, mixin);
-    proto['__patchProto'] = patchProto;
-  }
-  // old browsers don't have setPrototypeOf
-  obj.__proto__ = proto['__patchProto'];
-}
-
-
+// NOTE, prefer MutationObserver over Promise for microtask timing
+// for consistency x-platform.
 let twiddle = document.createTextNode('');
@@ -120,3 +85,3 @@ let content = 0;
 // use MutationObserver to get microtask async timing.
-export function microtask(callback) {
+export const microtask = (callback) => {
   queue.push(callback);
@@ -128,3 +93,3 @@ twiddle.textContent = content++;
 
-export function contains(container, node) {
+export const contains = (container, node) => {
   while (node) {
@@ -134,3 +99,3 @@ if (node == container) {
     }
-    node = node.parentNode;
+    node = node[SHADY_PREFIX + 'parentNode'];
   }
@@ -140,11 +105,8 @@ return false;
 
-function getNodeHTMLCollectionName(node) {
-  return node.getAttribute('id') || node.getAttribute('name');
-}
+const getNodeHTMLCollectionName = (node) =>
+    node.getAttribute('id') || node.getAttribute('name');
 
-function isValidHTMLCollectionName(name) {
-  return name !== 'length' && isNaN(name);
-}
+const isValidHTMLCollectionName = (name) => name !== 'length' && isNaN(name);
 
-export function createPolyfilledHTMLCollection(nodes) {
+export const createPolyfilledHTMLCollection = (nodes) => {
   // Note: loop in reverse so that the first named item matches the named property
@@ -179,1 +141,46 @@ for (let l = nodes.length - 1; l >= 0; l--) {
 }
+
+export const NATIVE_PREFIX = '__shady_native_';
+export const SHADY_PREFIX = '__shady_';
+
+
+// patch a group of accessors on an object only if it exists or if the `force`
+// argument is true.
+/**
+ * @param {!Object} obj
+ * @param {!Object} descriptors
+ * @param {boolean=} force
+ */
+export const patchProperties = (proto, descriptors, prefix = '') => {
+  for (let p in descriptors) {
+    const newDescriptor = descriptors[p];
+    newDescriptor.configurable = true;
+    const name = prefix + p;
+    // NOTE: we prefer writing directly because some browsers
+    // have descriptors that are writable but not configurable (e.g.
+    // `appendChild` on older browsers)
+    if (newDescriptor.value) {
+      proto[name] = newDescriptor.value;
+    } else {
+      // NOTE: this can throw if 'force' is used so catch the error.
+      try {
+        Object.defineProperty(proto, name, newDescriptor);
+      } catch(e) {
+        // this error is harmless so we just trap it.
+      }
+    }
+  }
+}
+
+export const NativeHTMLElement =
+    (window['customElements'] && window['customElements']['nativeHTMLElement']) ||
+    HTMLElement;
+
+// note, this is not a perfect polyfill since it doesn't include symbols
+export const getOwnPropertyDescriptors = (obj) => {
+  const descriptors = {};
+  Object.getOwnPropertyNames(obj).forEach((name) => {
+    descriptors[name] = Object.getOwnPropertyDescriptor(obj, name);
+  });
+  return descriptors;
+};

New alerts

Major refactor

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Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

433234

increased by14.3%

Number of package files

35

increased by52.17%

Lines of code

4325

increased by12.51%

Worsened metrics

Dev dependency count

16

increased by14.29%

Number of medium supply chain risk alerts

1

increased byInfinity%

No dependency changes